#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
int main()
{
    int m = 0;
    while (scanf("%d", &m) != EOF)
    {


        int j = m * m - m + 1;
        for (int i = 0; i < m; i++)
        {
            printf("%d", j);
            j += 2;
            if (i < m - 1)
                printf("+");
        }



    }
    return 0;
}